Well-drill attachment.



N0.,759,662. v PATENTED MAY 10, 1904.v W. L. BRUNER.

WELL DRILL ATTACHMENT.

APPLICATION FILED DEC. 16, 1903. N0 MODEL.

my/l'amlnlir an e 1".- lvihuzmca UNITED STATES Patented May 10, 1904.

PATENT OFFICE.

WELL-DRILL ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 759,662, dated May 10, 1904.

Application filed December 16,1908. Serial No. 185A59. (No model.)

T0 at! whom it may concern.-

Be it known that I, WILLIAM LESLIE BRU- NER, a citizen of the United States, residing at Shelton, in the county of Buffalo and State of Nebraska, have invented new and useful Improvements in Well-Drill Attachments, of which the following is a specification.

This invention relates to a well-drill attachment; and the primary object of the same is to provide a tubular drop-drill or excavator for use in soil, clay, dry sand, and dry gravel, where it' is unnecessary to employ the usual form of drill-bit and hydraulic or other driving means.

The invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter set forth.

In the drawings, Figure 1 is an elevation of a drill attachment embodying the features of the invention. Fig. 2 is a transverse vertical section through the same. Fig. 3 is a horizontal section taken in a plane of the line 3 3, Fig. 2.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

The attachment consists of an elongated tube 1, which may be specially formed for the purpose, or consist of gas-pipe and open at its upper and lower ends. To the upper end a head-yoke 2 is secured and adapted to be attached to a drilling-machine in a manner similar to the ordinary drill-point or other attachments used in well-drilling. The lower end of the tube 1 is formed with a beveled cutting edge 3, and above said end is an elongated vertically-disposed clearing slot 4:. The upper part of the tube, opposite the location of the slot 4:, is also formed with a similar slot 5.

By having the slots 4 and 5 arranged as set forth and shown, or so that the lower terminal of the upper slot 5 is above the upper terminal of the lower slot 4, weakening of the tube lis prevented and convenient means for cleaning the tube or relieving the same of material sticking therein is provided. If the slots extended full length of the tube, the latter would be materially weakened.

In the use of the improved attachment it is applied to the drill mechanism and forced into the soil, clay, dry sand, or dry gravel, as the case may be, and either of such materials will pass upwardly into the tube. The tube will hold the material passing upwardly thereinto until the surface of the ground is reached, when such material can be readily forced out of the tube by inserting a suitable implement in the slots 4 and 5.

One of the main ad vantages of the improved device, which may be termed an excavator, is that it can be used in cold weather in soils or sand which are not affected by freezing. Another advantage is in terminating the slot A above the lower cutting edge 3, in view of the fact that expansion of the tube will be prevented. If the slot 4 extended completely through the lower end of the tube, it is obvious that the latter would be free to expand when being forced downwardly, and it would not as reliably hold the material that passes upwardly thereinto when withdrawn from the opening formed thereby. It will be understood also that the improved attachment may be made in different lengths in accord ance with the demands of the work to be performed, and, furthermore, variations in the diameter of the tube may also be resorted to.

By having the upper end of the tube open compression of air within the tube is prevented and the material to be removed is per miltted to freely pass upwardly into the said tu e.

Having thus fully described the invention, what is claimed as new is- A well-drill attachment consisting of an elongated tube fully open at its upper and lower ends, the lower end being beveled, and upper and lower slots in opposite portions of the body of the tube, the lower terminal of the upper slot being above the upper terminal of the lower slot.

In testimony whereof I affix my signature in T. L. GRAEIUs, H. C. BRUNER. 

